From aa9a18fb938f2fa28e7e6786863ff310ba34594f Mon Sep 17 00:00:00 2001
From: laurentbarontini <l.barontini@open-squared.ch>
Date: Tue, 28 Apr 2026 13:33:37 +0200
Subject: [PATCH] =?UTF-8?q?Bug=20qt=20doubl=C3=A9e=20sale?=
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---
 modules/purchase_trade/sale.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/purchase_trade/sale.py b/modules/purchase_trade/sale.py
index e70b6db..1ec5447 100755
--- a/modules/purchase_trade/sale.py
+++ b/modules/purchase_trade/sale.py
@@ -1583,6 +1583,8 @@ class SaleLine(metaclass=PoolMeta):
         for line in lines:
             if line.id not in old_values:
                 continue
+            if old_values[line.id] is None:
+                continue
             old = Decimal(old_values[line.id] or 0)
             new = Decimal(line.quantity_theorical or 0)
             delta = new - old